home-assistant.io/source/_cookbook/track_battery_level.markdown

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layout	title	description	date	sidebar	comments	sharing	footer	ha_category
page	Track your phone battery level	Basic example how to track the battery level of your mobile devices.	2016-01-29 09:00	true	false	true	true	Automation Examples

{% linkable_title iOS Devices %}

If you have a device running iOS (iPhone, iPad, etc), The iCloud component is gathering various details about your device including the battery level. To display it in the Frontend use a template sensor. You can also use the battery sensor device class to dynamically change the icon with the battery level.

{% raw %}

sensor:
  - platform: template
    sensors:
      battery_iphone:
        friendly_name: iPhone Battery
        unit_of_measurement: '%'
        value_template: >-
            {%- if states.device_tracker.iphone.attributes.battery %}
                {{ states.device_tracker.iphone.attributes.battery|round }}
            {% else %}
                {{ states.sensor.battery_iphone.state }}
            {%- endif %}
        device_class: battery

{% endraw %}

{% linkable_title Android and iOS Devices %}

While running the Owntracks device tracker you can retrieve the battery level with a MQTT sensor. Replace username with your MQTT username (for the embedded MQTT it's simply homeassistant), and deviceid with the set Device ID in Owntracks.

{% raw %}

sensor:
  - platform: mqtt
    state_topic: "owntracks/username/deviceid"
    name: "Battery Tablet"
    unit_of_measurement: "%"
    value_template: '{{ value_json.batt }}'
    device_class: battery

{% endraw %}